1940 Census Enumeration District Maps - Pennsylvania - Columbia County - Conyngham - ED 19-30, ED 19-31

Chicago citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011). 1940 Census Enumeration District Maps - Pennsylvania - Columbia County - Conyngham - ED 19-30, ED 19-31. 1880-01-01/1990-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5837265. (Accessed September 19, 2018.)
APA citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011), (1880-01-01/1990-12-31) 1940 Census Enumeration District Maps - Pennsylvania - Columbia County - Conyngham - ED 19-30, ED 19-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/5837265
MLA citation style
Department of Commerce. Bureau of the Census. Office of the Associate Director for Decennial Census. Geography Division. (1/1987 - 7/15/2011). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/5837265>.
Note: These citations are programmatically generated and may be incomplete.